No. 5: Art Mahaffey vs Chicago Cubs (4/23/1961)
Final line: 9 IP 17 K 0 R 4 H 1 BB
Mahaffey is not one of the greatest Phillies ever. He finished his career with a losing record and in seven career season only had a sub three ERA once. Yet for one day he was as dominant as it gets. In one of his nine career shutouts Mahaffey struck out a Phillies all time record seventeen batters.